Shop Windows to the Universe

Tours

Take off on an Exploratour! Click on one of the many tours listed below to follow a guided tour through a topic. Remember to choose the level that you prefer before entering a tour by clicking one of the three levels that are at the top of this page. On the top of each page in the tour you will see our navigation graphic that will help you quickly

To move forwards through the tour, click the Forward arrow.

To move backwards through the tour, click the Back arrow.

To come back to this page and choose a different tour, click on the blue house button

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This Windows to the Universe Exploratour examines the scientific evidence of biological evolution. Take the tour to travel through 10 web pages about the scientific theory that explains how and why living...more

This tour is not ready yet, but you can click through and look at the pictures if you wish! Please come back in 30 days. This page is the start of the tour of the Evolution of the Solar System. The navigation...more

This is a drawing of the continent of India crashing into the continent of Asia. India is the purple continent to the right of the continent of Africa. The theory of plate tectonics tells us that many...more

The Archean is the name of the age which began with the forming Earth, as illustrated in this picture. This period of Earth's history lasted a long time, 2.8 billion years! That is more than half the...more

This page is the start of the tour which explores the surface of Earth. In this tour, we will describe different features found on the surface, plate tectonics and the result of these shifting plates....more

This page is the start of the tour which explores the surface of Mars. In this tour, we will describe different features found on the surface and the geography of the planet. Use the navigation button...more